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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_HARDWARE_SOUNDTRIGGER_H
     18 #define ANDROID_HARDWARE_SOUNDTRIGGER_H
     19 
     20 #include <binder/IBinder.h>
     21 #include <utils/threads.h>
     22 #include <soundtrigger/SoundTriggerCallback.h>
     23 #include <soundtrigger/ISoundTrigger.h>
     24 #include <soundtrigger/ISoundTriggerHwService.h>
     25 #include <soundtrigger/ISoundTriggerClient.h>
     26 #include <system/sound_trigger.h>
     27 
     28 namespace android {
     29 
     30 class MemoryDealer;
     31 
     32 class SoundTrigger : public BnSoundTriggerClient,
     33                         public IBinder::DeathRecipient
     34 {
     35 public:
     36 
     37     virtual ~SoundTrigger();
     38 
     39     static  status_t listModules(struct sound_trigger_module_descriptor *modules,
     40                                  uint32_t *numModules);
     41     static  sp<SoundTrigger> attach(const sound_trigger_module_handle_t module,
     42                                        const sp<SoundTriggerCallback>& callback);
     43 
     44     static  status_t setCaptureState(bool active);
     45 
     46             void detach();
     47 
     48             status_t loadSoundModel(const sp<IMemory>& modelMemory,
     49                                             sound_model_handle_t *handle);
     50 
     51             status_t unloadSoundModel(sound_model_handle_t handle);
     52 
     53             status_t startRecognition(sound_model_handle_t handle, const sp<IMemory>& dataMemory);
     54             status_t stopRecognition(sound_model_handle_t handle);
     55 
     56             // BpSoundTriggerClient
     57             virtual void onRecognitionEvent(const sp<IMemory>& eventMemory);
     58             virtual void onSoundModelEvent(const sp<IMemory>& eventMemory);
     59             virtual void onServiceStateChange(const sp<IMemory>& eventMemory);
     60 
     61             //IBinder::DeathRecipient
     62             virtual void binderDied(const wp<IBinder>& who);
     63 
     64             static status_t stringToGuid(const char *str, sound_trigger_uuid_t *guid);
     65             static status_t guidToString(const sound_trigger_uuid_t *guid,
     66                                          char *str, size_t maxLen);
     67 
     68 private:
     69             SoundTrigger(sound_trigger_module_handle_t module,
     70                             const sp<SoundTriggerCallback>&);
     71             static const sp<ISoundTriggerHwService>& getSoundTriggerHwService();
     72 
     73             Mutex                               mLock;
     74             sp<ISoundTrigger>                   mISoundTrigger;
     75             const sound_trigger_module_handle_t mModule;
     76             sp<SoundTriggerCallback>            mCallback;
     77 };
     78 
     79 }; // namespace android
     80 
     81 #endif //ANDROID_HARDWARE_SOUNDTRIGGER_H
     82